Acer AL2051 Service Manual page 38

3. Inverter Board
No backlight
Check ON/OFF signal
Check IC801 PIN5=5V+ -0.25V
Check IC801 PIN18 triangular wave is normal
Check IC801 PIN11, 12,19,20
End no output debug
Check L805 =12V
OK
OK
OK
OK
OK
NG
Check adapter board
NG
Check main board
NG
Check Q802,Q804,ZD803 circuit
NG
NG
38
Check R821,C821
Check feedback